Dakota Reference Manual  Version 6.4
Large-Scale Engineering Optimization and Uncertainty Analysis
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initial_delta


Initial step size for non-gradient based optimizers

Specification

Alias: none

Argument(s): REAL

Default: 1.0

Description

If initial_delta is supplied by the user, it will be applied in an absolute sense in all coordinate directions. APPS documentation advocates choosing initial_delta to be the approximate distance from the initial point to the solution. If this is unknown, it is advisable to err on the side of choosing an initial_delta that is too large or to not specify it. In the latter case, APPS will take a full step to the boundary in each direction. Relative application of initial_delta is not available unless the user scales the problem accordingly.